A power supply module is configured for converting an AC voltage to a first DC voltage and applying the first DC voltage to a load. The power supply module includes a rectifying and filtering unit, a PFC unit, a voltage transforming unit, an input port, and a switch unit. The rectifying and filtering unit rectifies the AC voltage into a primary DC voltage and filters the primary DC voltage. The PFC unit corrects a power factor of the filtered primary DC voltage. The voltage transforming unit converts the corrected primary DC voltage and generates the first DC voltage for applying the load. The input port receives a first instruction or a second instruction and generates a first signal or a second signal, respectively. The switch unit establishes or disconnects an electrical connection between the voltage transforming unit and the load according to the first signal or the second signal.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A power supply module configured for converting an alternating current (AC) voltage to a first direct current (DC) voltage and applying the first DC voltage to a load, the power supply module comprising: a rectifying and filtering unit configured for rectifying the AC voltage into a primary DC voltage and filtering the primary DC voltage; a power factor correction (PFC) unit configured for correcting a power factor of the filtered primary DC voltage; a voltage transforming unit configured for converting the corrected primary DC voltage and generating the first DC voltage; an input port configured for receiving a first instruction or a second instruction and generating a first signal or a second signal correspondingly; and a switch unit coupled between the voltage transforming unit and the load, the switch unit configured for establishing an electrical connection between the voltage transforming unit and the load for applying the first DC voltage to the load according to the first signal, or configured for disabling the electrical connection between the voltage transforming unit and the load to stop applying the first DC voltage to the load according to the second signal, wherein the switch unit comprises: a first transistor comprising a base, a collector, and an emitter, the base electrically connected to the input port, and the emitter electrically grounded; a metal oxide semiconductor (MOS) transistor comprising a gate, a drain, and a source, the gate electrically connected to the collector of the first transistor, the drain electrically connected to the load, and the source selectively receiving the first DC voltage; and a first resistor, electrically connected between the source and the gate of the MOS transistor.
2. The power supply module of claim 1 , wherein the switch unit comprises: a second resistor; the base of the first transistor electrically connected to the input port via the second resistor; and a third resistor; the gate of the MOS transistor electrically connected to the collector of the first transistor via the third resistor.
3. The power supply module of claim 2 , wherein the first transistor is a NPN bipolar junction transistor.
4. The power supply module of claim 2 , wherein the MOS transistor is an enhancement P type channel MOS transistor.
5. The power supply module of claim 1 , wherein when the PFC unit is powered on, the PFC unit performs the power factor corrective function; when the PFC unit is powered off, the PFC unit functions as a transmission line for transmitting the filtered primary DC voltage to the voltage transforming unit.
6. The power supply module of claim 1 , wherein the voltage transforming unit is further configured for generating a second DC voltage and a third DC voltage, and the third DC voltage is configured for applying to the PFC unit.
7. The power supply module of claim 6 , further comprising: a control unit receiving the second DC voltage and configured for allowing or disabling the third DC voltage to apply to the PFC unit according to the first signal or the second signal.
8. The power supply module of claim 7 , wherein the control unit comprises: a second transistor comprising a base, a collector, and an emitter, the emitter of the second transistor electrically grounded; a third transistor comprising a base, a collector, and an emitter, the emitter of the third transistor selectively receiving the third DC voltage, the collector of the third transistor electrically connected to the PFC unit; a fourth resistor, electrically connected between the emitter and the base of the third transistor; a fifth resistor; a sixth resistor; an optical coupler comprising: a fourth transistor comprising a base, a collector, and an emitter, the collector of the fourth transistor electrically connected to the base of the third transistor via the fifth resistor, the emitter of the fourth transistor electrically grounded; and a light-emitting diode (LED) comprising an anode and a cathode, the anode selectively receiving the second DC voltage via the sixth resistor, the cathode electrically connected to the collector of the second transistor; and a seventh resistor, electrically connected between the input port and the base of the second transistor.
9. The power supply module of claim 8 , wherein the control unit further comprises a filter capacitor, electrically connected between the base and the emitter of the second transistor.
10. The power supply module of claim 8 , wherein the second transistor is a NPN bipolar junction transistor.
11. The power supply module of claim 8 , wherein the third transistor is a PNP bipolar junction transistor.
12. The power supply module of claim 6 , wherein the voltage transforming unit comprises a first port configured for outputting the first DC voltage, a second port configured for outputting the second DC voltage, and a third port configured for outputting the third DC voltage.
13. The power supply module of claim 1 , wherein the first signal is a high level signal, and the second signal is a low level signal, and wherein the power supply module assumes a power supply mode according to the high level signal, and a power saving mode according to the low level signal.
14. The power supply module of claim 1 , wherein the rectifying and filtering unit comprises a bridge rectifier and a low-pass filter circuit, the bridge rectifier is configured for providing the rectifying function for the AC voltage and generating the primary DC voltage, the low-pass filter circuit is configured for providing a high-block function for the rectified primary DC voltage.
15. A power supply module capable of operating between a power supply mode and a power saving mode, the power supply module configured for converting an alternating current (AC) voltage into a load direct current (DC) voltage and applying the first DC voltage to a load, the power supply module comprising: a rectifying and filtering unit configured for rectifying the AC voltage into a primary DC voltage and filtering the primary DC voltage; a power factor correction (PFC) unit configured for correcting a power factor of the filtered primary DC voltage; a voltage transforming unit configured for converting the corrected primary DC voltage and generating the first DC voltage and a second DC voltage; and a control unit configured for receiving the second DC voltage, a first instruction, and a second instruction; and a switch unit; wherein when the control unit receives the first instruction, the switch unit is actuated for switching the power supply module to the power supply mode, so as to apply the first DC voltage to the load; when the control unit receives the second instruction, the switch unit is actuated for switching the power supply module to the power saving mode, so as to stop applying the first DC voltage to the load, the switch unit comprises: a first transistor comprising a base, a collector, and an emitter, the base electrically connected to the input port, and the emitter electrically grounded; a metal oxide semiconductor (MOS) transistor comprising a gate, a drain, and a source, the gate electrically connected to the collector of the first transistor, the drain electrically connected to the load, and the source selectively receiving the first DC voltage; and a first resistor, electrically connected between the source and the gate of the MOS transistor.
16. The power supply module of claim 15 , wherein the voltage transforming unit is further configured for generating a third DC voltage, and the third DC voltage is configured for applying to the PFC unit.
17. The power supply module of claim 15 , wherein when the PFC unit is powered on, the PFC unit performs the power factor corrective function; when the PFC unit is powered off, the PFC unit transmits the filtered primary DC voltage to the voltage transforming unit.
Cooperative Patent Classification codes for this invention. Click any code to explore related patents in that topic.
September 25, 2009
December 6, 2011
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